Patent US3211834A successfully refreshed from Google Patents.
US3211834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fm multiplex stereophonic broadcast receiver
Assignee: Pioneer Corp
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Filing: 1963-12-04
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Granted: 1965-10-12
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Expires: 1983-12-04
Abstract
No abstract record available.
Inventors
- 👤 Okatani Masanao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:46
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/2209; H03D1/2227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN AN FM MULTIPLEX STEREOPHONIC BROADCAST RECEIVER, THE COMBINATION COMPRISING: TWO MULTIELECTRODE VACUUM TUBES OTHER THAN DIODES WHICH ARE AMPLY BIASED, AND THE PLATE CURRENTS OF WHICH ARE CUT OFF, THE SAID TWO VACUUM TUBES BEING ELECTRICALLY DISPOSED IN PARALLEL ARRANGEMENT WITH THE SAME POLARITY; A FIRST MEANS ADAPTED TO APPLY TO THE CONTROL GRIDS OF THE SAID TWO VACUUM TUBES SIGNALS WHICH CONSIST OF COMPOSITE SIGNALS OF THE SAME PHASE AND SWITCHING SIGNALS OF OPOSITE PHASE, THEREBY TO ACCOMPLISH, SIMULTANEOUSLY, SWITCHING AND MATRIXING OF THE COMPOSITE SIGNAL AND TO ACCOMPLISH DETECTING, THE RESULTING TWO, LEFT AND RIGHT, DETECTED OUTPUTS BEING AUDIOFREQUENCY AMPLIFIED BY MEANS OF THE SAID TWO VACUUM TUBES TO INCREASE THE DETECTION GAIN; A COMMON IMPEDANCE THROUGH WHICH THE CATHODES OF THE SAID TWO VACUUM TUBES ARE GROUNDED, THEREBY TO OBTAIN MUTUALLY ACTING NEGATIVE FEEDBACKS; AND MEANS TO CREATE CROSS-TALK COMPONENTS OF OPPOSITE PHASE IN ACCORDANCE WITH THE SAID NEGATIVE FEEDBACKS AND TO CAUSE MUTUAL-MIXING OF THE SAID CROSS-TALK COMPONENTS ON THE OUTPUT SIDE, THEREBY AFFORDING ADJUSTMENT OF THE DEGREE OF SEPARATION.
Claim 2
Dependent Claim
175 words
IN AN FM MULTIPLEX STEREOPHONIC BROADCAST RECEIVER, THE COMBINATION COMPRISING: TWO MULTIELECTRODE VACUUM TUBES OTHER THAN DIODES WHICH ARE AMPLY BIASED, AND THE PLATE CURRENTS OF WHICH ARE CUT OFF, THE SAID TWO VACUUM TUBES BEING ELECTRICALLY DISPOSED IN PARALLEL ARRANGEMENT WITH THE SAME POLARITY; A FIRST MEANS ADAPTED TO APPLY TO THE CONTROL GRIDS OF THE SAID TWO VACUUM TUBES SIGNALS WHICH CONSIST OF COMPOSITE SIGNALS OF THE SAME PHASE AND SWITCHING SIGNALS OF OPOSITE PHASE, THEREBY TO ACCOMPLISH, SIMULTANEOUSLY, SWITCHING AND MATRIXING OF THE COMPOSITE SIGNAL AND TO ACCOMPLISH DETECTING, THE RESULTING TWO, LEFT AND RIGHT, DETECTED OUTPUTS BEING AUDIOFREQUENCY AMPLIFIED BY MEANS OF THE SAID TWO VACUUM TUBES TO INCREASE THE DETECTION GAIN; A COMMON IMPEDANCE THROUGH WHICH THE CATHODES OF THE SAID TWO VACUUM TUBES ARE GROUNDED, THEREBY TO OBTAIN MUTUALLY ACTING NEGATIVE FEEDBACKS; AND MEANS TO CREATE CROSS-TALK COMPONENTS OF OPPOSITE PHASE IN ACCORDANCE WITH THE SAID NEGATIVE FEEDBACKS AND TO CAUSE MUTUAL-MIXING OF THE SAID CROSS-TALK COMPONENTS ON THE OUTPUT SIDE, THEREBY AFFORDING ADJUSTMENT OF THE DEGREE OF SEPARATION.
References Cited (Backward Citations)
US3175040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |